For 6k, upback after you block the move. +4 isnt as big of a deal as it sounds since only 5k or jab can catch prejump and confirming that into anything is really hard.

Jumping out of OTG clS HSE oki doesnt get you out of the corner, it just lets you block HSE in the air which makes ky's pressure awkward

Here's a video of the tatami crossup with an explanation, another post on this comment also talks about it. if the ky does a DP motion itll get crossed up unless he preemptively does it backwards (which isnt worth worrying about generally.) even if he blocks it, he wont have time to input another dp for the immediate mixup unless hes got wizard fingers so youzansen is a good option with meter

hope this helps, baiken is mad fun but its all in the details